North Face has a nice messenger bag (I believe it is the Shifty model)that even has a waist belt for extra stabilization of the pack. It does not come with a plethora of compartments that will send you on a hunt for a wallet that you keep meaning to put in the same place, but you just don't. My boyfriend uses it for our travels. I use a Timbuk2 messenger bag. I love it. It has the strongest Velcro closure know to man that makes the most obnoxious sound upon opening, so if someone tried to get in, you would know and have time to karate chop. In addition to the Velcro closure, it also clips. It has a waste belt as well and 2 compartments so once again you won't have 12 compartments to look thru when you search for the wallet you can't seem to put in the same place. Both fabrics are waterproof, I believe the fabric is Ballistics, PVC tarpaulin. The timbuk2 bag has nice reflectors for nighttime.
If you Google shop these 2 bags, you could find them pretty cheap. But if you buy a Timbuk2 messenger back new, they are not cheap. I picked up mine at a Marshall's for $25. Brand new on line, they can run over a $100.